(19)
(11) EP 1 126 234 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.04.2002 Bulletin 2002/17

(43) Date of publication A2:
22.08.2001 Bulletin 2001/34

(21) Application number: 01300576.4

(22) Date of filing: 23.01.2001
(51) International Patent Classification (IPC)7: F42D 1/10
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 17.02.2000 US 505841

(71) Applicant: Dyno Nobel Inc.
Salt Lake City, Utah 84144-0103 (US)

(72) Inventors:
  • Atkinson, Kerry S.
    Lehi, Utah 84043 (US)
  • Halander, John B.
    Murrah, Utah 84107 (US)

(74) Representative: Froud, Clive et al
Elkington and Fife Prospect House 8 Pembroke Road
Sevenoaks, Kent TN13 1XR
Sevenoaks, Kent TN13 1XR (GB)

   


(54) Delivery of emulsion explosive compositions through an oversized diaphragm pump


(57) The present invention relates to a system and method for delivering emulsion explosive compositions into a borehole by means of an oversized diaphragm pump (4), which provides a relatively constant flow rate for the pumped emulsion composition thereby minimizing flow pulsations during delivery. More specifically, the system and method comprise an oversized diaphragm pump of significantly higher capacity than the intended flow rate of the emulsion composition, in combination with a water injection system that provides a lubricating annular stream of pressurized water between the pumped emulsion composition and the inner surface of a delivery hose for delivering the composition into a borehole. By minimizing flow pulsations, a safe, simple and easy to handle system and method for the delivery of emulsion compositions into boreholes are provided. Moreover, the diaphragm pump operates at a relatively low pressure which also enhances safety.






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